Fish: , , , cold-blooded and gills, lags eggs/give birth in water , Amphibians: , , , cold-blooded, gills and lungs , thin moist skin, lays jelly-like eggs in water, Reptiles: , , , cold-blooded and lungs, scales, lay leathery eggs on land/live birth, Birds: , , , warm-blooded, lungs, feathers , lays hard eggs on land, Mammals: , , , warm-blooded, lungs, hair, live birth , feed milk to young,
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Vertebrates
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Marysheldon
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